Method for manufacturing microlens array

Abstract

The invention discloses a preparation method for a micro-lens array, which comprises the following steps: Step 1, a UV curing adhesive is coated and distributed on a mold; Step 2, the mold coated and distributed with the UV curing adhesive is put in a polymerization inhibition atmosphere for ultraviolet radiation for the first time; Step 3, ultraviolet radiation for the second time is carried out in an atmosphere without polymerization inhibition; Step 4, peeling is carried out. A step of covering a substrate material can be included between the Step 2 and the Step 3. The UV curing adhesive can be a UV curing adhesive of oxygen polymerization inhibition type. The mold can be a columnar low arched parallel array mold or a columnar slightly concave parallel array mold; the method adopts a secondary ultraviolet curing method, which can well solve the problem of shrinkage of the UV curing adhesive when a columnar slightly concave lens array is prepared and is not limited by the arc height of a columnar micro-lens array.

Description

technical field [0001] The invention relates to a method for preparing a columnar microlens array, in particular to a method for preparing a microlens array that can avoid the decrease in precision of the microlens array caused by shrinkage during UV glue curing. Background technique [0002] In three-dimensional display technology, especially in naked-eye three-dimensional display technology, the use of microlens arrays is becoming more and more extensive, and the production technology of microlens arrays is becoming more and more mature and diverse, especially the production of UV curing glue (ultraviolet light curing glue). The technology of microlens array has attracted more and more attention and development. UV curing adhesives are composed of prepolymers, active monomers, photoinitiators and other main components and additives such as stabilizers and leveling agents. Under the irradiation of UV light of appropriate wavelength, the photoinitiator rapidly generates fre...

AI Technical Summary

Problems solved by technology

[0010] Since the prepared columnar micro-concave lens array needs to have a certain hardness and refractive index, it is very limited in the selection of UV curing adhesive materials or the selection of methods and processes for synthesizing UV curing adhesives. UV with matching refractive index but higher hardness Cured glue will not be applied, the harder it is, the more it will shrink

If several UV curing adhesives are used to make a mixture, the hardness can be reduced and the shrinkage can be reduced, but the refractive index will be affected, resulting in the application of the columnar micro-concave lens array not reaching the ideal effect; and when making the UV curing adhesive mixture. will increase the cost

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